Your right it was a sur-name given to those with a jewish ancestory. Here's the kicker! Alejandro has a few other variants...such as Alessandra, Alessandro, Lassandro, Lassandra, Sandron, Sandrone, Sandrolini, Sandre, Sandras, Sandra, and Di Sandro. Most of the "Alejandro's" and it's other variants hailed from one of three places. Spain, Italy, and Belgium. Belgium is probably your biggest clue for the whole last name bit. Rafael Alejandro settled in New Orleans in 1854. It's my guess he came here and married into a jewish family and the name got passed along and it intertwinded. I'm mostly mexican from my father...I know nothing of my grandfather though. Here's another little kicker I'm not sure what it means the our old names from spain like Sandre and Sandras the San's look very much like another word I've seen and I just remembered what it was. SANGREAL! Were we once holy knights??? I've seen cheep copies of our crest it has three dogs sanding normaly with one front paw up all three top to bottom faceing left. I'm looking more into crests right now they're the oldest records I can seem to find on anything. I need to learn where the real ones are and how to read them. I hope I have been of some help.